python one-liner

Question

I want a one-liner solution In Python of the following code but how?

total = 0
for ob in self.oblist:
    total+=sum(v.amount for v in ob.anoutherob)

It returns total value. I want it one liner , plz any one help me

Answer 1

No need to double up on the sum() calls

total = sum(v.amount for ob in self.oblist for v in ob.anotherob)

Answer 2

You can just collapse the for loop into another level of comprehension:

total = sum(sum(v.amount for v in ob.anotherob) for ob in self.oblist)